Basic Principles of the PAD™ Technique
PAD™ is a means of killing bacteria. The following papers describe the principle behind the process and also the extent to which this type of technology has been developed.
Journal of Photobiology and Photochemistry 86 (2007, 43-44)
An editorial by Winkler K.D. Journal of Photochemistry and Photobiology B: Biology. 2007. 86: 43-44. Highlights the factors which influence outcome and which are important for satisfactory performance.
Wainwright, Antimicrobial Chemotherapy 42:13-18 
Article by Wainwright M. Journal of Antimicrobial Chemotherapy. 1998 42: 13 -18. Indicating effectiveness of PACT
Konopka and Gosliski, «Photodynamic Therapy in Dentistry», J Dent Res 86 694-707 2007
Article by Konopka A and Gosliski B Journal of Dental Research. 2007. 86: 694-707. Provides a general overview of PDT in dentistry and includes a section on its use as an antimicrobial treatment.
Jori et al, «Photodynamic therapy in the treatment of microbial infection :Basic principles and perspective applications», Lasers in Surgery and Medicine 38:468-481 
Final article in this section by Jori G et al Lasers in Surgery and Medicine 38:468–481 (2006). Shows the importance of photosensitizers in decreasing the microbial population.